anSystem software has been the industry’s leading well test analysis program for more than 20 years. It is a robust yet easy-to-use software tool that provides multiple options for models and analysis. These options include industry standards as well as user-defined models for additional flexibility. Ultimately, the PanSystem application provides a way to simplify complex transient well testing through detailed analysis, simulation, and reporting. PanSystem software is dedicated to transient well testing, a key technical function in the oil and gas industry. A pressure transient well test has the unique ability to obtain information from within the reservoir surrounding the well and with appropriate testing and analysis techniques can provide a wealth of data: * Permeability of the reservoir-at-large and, in some cases, the near-wellbore region * Completion efficiency, effective open interval size (over the life of the well) * Reservoir structure (boundaries, heterogeneities) * Reservoir pressure * Nature of any pressure support * Drainage area, connected pore volume, and initial hydrocarbons in place * Vertical permeability, vertical communication in layered systems * Well performance (over the life of the well) * Communication between wells * Deliverability and production forecast